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  • 2 weeks later...

GT1 motor = awesome. (except for glued in coolant bungs)

M96 & M97 = 2.7

9A1 = yet to be seen.

I sold my 996TT X50 and bought a 997 Carrera S.... and now I'm debating my decision. The more research I do on these 3.8 M97 motors the more I get freaked out. They're just like the old 2.7 liter engines. Porsche bored out the 2.4 liter motors to make the 2.7 and in doing so the coolant passages got smaller and the motors were prone to overheat and failure... The 3.6 and 3.8 M97 motors are the exact same... larger displacement in same block as 3.4 and now they have coolant issues and are prone to cylinder scars and cylinder liner failures on bank 2. It sucks having a Porsche that you don't feel like you can ring it out without having a potential failure. I'm adding a radiator and changing the thermostat to a cooler unit and running a Tungsten Disulphide Fullerene Nano Particle additive to try and mitigate this problem from happening to me, but if I knew then what I know now I don't think I would have bought a 997.

In my opinion the only Porsche 911's that are worth a **** now days are the Turbo's up to 2010 and all the GT cars. The rest I think have subtle engine design flaws that will lead to eventual failures at some point unless the owners are just very anal about keeping them as cool as possible and not following the Porsche recomended super stupid long maintenance intervals.

You 996TT boys...stick with them. Those motors are awesome. Like the gentleman above, you may end up replacing everything around the motor, but motor failures are very very rare.

I've only had my 997 for about a month and I'm debating selling it already. Love the car and the way it looks and handles but I'm paranoid about the motor now, which makes for a not fun owning experience. Porsche claims this great reliabilty but personally I think it's bunk. I bet if you do a per mileage failure rate the Porsche looks like crap compared to everything else. When you look at the failure rate per year they probably look pretty good as the majority of owners will have maybe 30K miles on a 6 year old car. I would hope in 30,000 miles of use there wouldn't be any major failures but even that's not the case... I know of guys with 20K mile M97 cars with cylinder liner failures. That's garbage! Luckily for one owner I know of, his failed outside of the CPO warranty and Porsche still agreed to pay for 85% of the repair so that's cool but I doubt that happens for the majority of people. The IMS issues and now the cylinder liner issues are both due to Porsche trying to save a buck in production. A car company that has the highest per car profit margin shouldn't be cutting corners on engine design.

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  • 3 weeks later...

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